The Ministry of Defense confirmed that the fleet of RAF surveillance planes has been suspended due to a fault discovered in one of the aircraft.

As a precautionary measure, seven of Britian’s Boeing Sentry E3D are temporarily pulled out of service. The fault was discovered after a routine inspection.

The fleet of Sentry E3D are based at RAF Waddington in Lincolnshire. They provide early warning and fighter control systems.

The MoD is confident it will not affect operations as other aircraft are available.

A statement from MoD said: “A routine inspection on an E3D aircraft at RAF Waddington has revealed a technical issue with one of the in-service aircraft. Routine E3D operations have been temporarily suspended pending further engineering investigation. There is no loss of operational capability.”

Defense Secretary Phillip Hammond rode one of Sentry E3D as the RAF prepare for the security cover for the London Olympics.